xen.h

  1/* SPDX-License-Identifier: GPL-2.0 */
  2#ifndef _XEN_XEN_H
  3#define _XEN_XEN_H
  4
  5#include <linux/types.h>
  6
  7enum xen_domain_type {
  8	XEN_NATIVE,		/* running on bare hardware    */
  9	XEN_PV_DOMAIN,		/* running in a PV domain      */
 10	XEN_HVM_DOMAIN,		/* running in a Xen hvm domain */
 11};
 12
 13#ifdef CONFIG_XEN
 14extern enum xen_domain_type xen_domain_type;
 15#else
 16#define xen_domain_type		XEN_NATIVE
 17#endif
 18
 19#ifdef CONFIG_XEN_PVH
 20extern bool xen_pvh;
 21#else
 22#define xen_pvh			0
 23#endif
 24
 25#ifdef CONFIG_X86
 26#include <asm/cpufeature.h>
 27
 28#define xen_pv_domain()		(cpu_feature_enabled(X86_FEATURE_XENPV))
 29#else
 30#define xen_pv_domain()		0
 31#endif
 32
 33#define xen_domain()		(xen_domain_type != XEN_NATIVE)
 34#define xen_hvm_domain()	(xen_domain_type == XEN_HVM_DOMAIN)
 35#define xen_pvh_domain()	(xen_pvh)
 36
 37extern uint32_t xen_start_flags;
 38
 39#ifdef CONFIG_XEN_PV
 40extern bool xen_pv_pci_possible;
 41#else
 42#define xen_pv_pci_possible	0
 43#endif
 44
 45#include <xen/interface/hvm/start_info.h>
 46extern struct hvm_start_info pvh_start_info;
 47void xen_prepare_pvh(void);
 48struct pt_regs;
 49void xen_pv_evtchn_do_upcall(struct pt_regs *regs);
 50
 51#ifdef CONFIG_XEN_DOM0
 52#include <xen/interface/xen.h>
 53#include <asm/xen/hypervisor.h>
 54
 55#define xen_initial_domain()	(xen_domain() && \
 56				 (xen_start_flags & SIF_INITDOMAIN))
 57#else  /* !CONFIG_XEN_DOM0 */
 58#define xen_initial_domain()	(0)
 59#endif	/* CONFIG_XEN_DOM0 */
 60
 61struct bio_vec;
 62struct page;
 63
 64bool xen_biovec_phys_mergeable(const struct bio_vec *vec1,
 65		const struct page *page);
 66
 67#if defined(CONFIG_MEMORY_HOTPLUG) && defined(CONFIG_XEN_BALLOON)
 68extern u64 xen_saved_max_mem_size;
 69#endif
 70
 71#ifdef CONFIG_XEN_UNPOPULATED_ALLOC
 72extern unsigned long xen_unpopulated_pages;
 73int xen_alloc_unpopulated_pages(unsigned int nr_pages, struct page **pages);
 74void xen_free_unpopulated_pages(unsigned int nr_pages, struct page **pages);
 75#include <linux/ioport.h>
 76int arch_xen_unpopulated_init(struct resource **res);
 77#else
 78#define xen_unpopulated_pages 0UL
 79#include <xen/balloon.h>
 80static inline int xen_alloc_unpopulated_pages(unsigned int nr_pages,
 81		struct page **pages)
 82{
 83	return xen_alloc_ballooned_pages(nr_pages, pages);
 84}
 85static inline void xen_free_unpopulated_pages(unsigned int nr_pages,
 86		struct page **pages)
 87{
 88	xen_free_ballooned_pages(nr_pages, pages);
 89}
 90#endif
 91
 92#if defined(CONFIG_XEN_DOM0) && defined(CONFIG_ACPI) && defined(CONFIG_X86)
 93bool __init xen_processor_present(uint32_t acpi_id);
 94#else
 95#include <linux/bug.h>
 96static inline bool xen_processor_present(uint32_t acpi_id)
 97{
 98	BUG();
 99	return false;
100}
101#endif
102
103#endif	/* _XEN_XEN_H */